Composite modified asphalt of styrene butadiene styrene block polymer (SBS) and rubber powder and preparation method thereof

Abstract

The invention relates to a composite modified asphalt of styrene butadiene styrene block polymer (SBS) and rubber powder and a preparation method thereof. The modified asphalt comprises 0.3-0.4% of a stabilizer, 0.03% of an activating agent, 10-15% of rubber powder, 2% of SBS, 3-4% of styrene-butadiene rubber extending oil and the balance of matrix asphalt, wherein the total weight meets 100%. The preparation method of the modified asphalt comprises the steps of dividing the matrix asphalt into two equal mass of parts, firstly, preheating the first part to 125+ / -2 DEG C; adding the SBS and the styrene-butadiene rubber extending oil to heated asphalt to shear and disperse at medium and high speeds; adding the rubber powder and the activating agent to the other part of matrix asphalt, swelling for 2 hours at 160 DEG C, finally shearing and dispersing the two parts of mixtures for 1 hour under the condition of 180 DEG C, and then adding the stabilizer, and cutting and developing for 1 hour at a low speed and then preparing the composite modified asphalt of rubber powder / SBS. The composite modified asphalt of the SBS and the rubber powder disclosed by the invention has the advantages that the composite modified asphalt is fully swelled; the noise-reduction is obviously reduced; and the preparation method is reasonable in construction technology, low in energy consumption, and excellent in performance of the composite modified asphalt.

Description

technical field [0001] The invention relates to an SBS+rubber powder composite modified asphalt and a preparation method thereof. Background technique [0002] At present, the actual quality of my country's highways has problems that cannot be ignored. As far as asphalt pavement is concerned, roads generally have problems of poor durability, short service life and early damage. Typical damages such as subsidence, cracks, ruts, looseness, and potholes on asphalt pavement can be seen everywhere on urban roads, which seriously affects The use performance of the road is deteriorated, causing great economic waste and potential safety hazards. The reasons for these pavement damages, in addition to factors such as design, construction, maintenance, etc., are also important reasons for the performance of materials, especially asphalt materials. Generally speaking, asphalt materials with weak temperature sensitivity, good high-temperature performance and low-temperature performance...

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Problems solved by technology

Chinese patent CN102181163A discloses a waste rubber powder, SBS composite modified asphalt and its production process. The addition of SBS is only 0.1%~0.4%, and the modification effect on asphalt is not obvious

At the same time, many studies in recent years have mixed the additives with the base asphalt at one time, and the modification effect of the base asphalt is not very obvious.

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